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Circuit breaker

A circuit breaker and circuit technology, applied in the direction of electrical components, cable installation, protection switch operation/release mechanism, etc.

Inactive Publication Date: 2006-08-23
FUJI ELECTRIC FA COMPONENTS & SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes it practically difficult to attach the thick protective cover to the latch seat

Method used

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  • Circuit breaker
  • Circuit breaker
  • Circuit breaker

Examples

Experimental program
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Embodiment Construction

[0044] Below, will be based on Figure 1A and 1B as well as Figure 2A and 2B Embodiments of the present invention will be described. In the attached figure showing the example, with image 3 The corresponding components in are denoted by the same symbols, and their explanations are omitted.

[0045] That is, as shown in the accompanying drawing (see Figure 1A ) has basically the same arrangement as existing circuit breakers, but differs in the following points. First, will image 3The partitions 1 a arranged in the molded housing 1 are shown removed. This allows the molded case 1 of the present invention to have a gas outflow path formed as a space between the arc extinguishing chamber 5 and the gas outlet 1c on the load side terminal 2 side, in which path the latch seat 11 is placed. In this way, the gas generated in the arc-extinguishing chamber 5 when the current is interrupted can be easily discharged not only from the gas outlet 1b opened on the side of the power-...

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PUM

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Abstract

The invention provided a circuit breaker improved so as to prevent metal melt from adhering to a locking part with a trip crossbar and to enhance interrupting capacity. In the circuit breaker provided in a molded case 1 with a fixed contactor 3, a movable contactor 4, a narrow-gap arc-extinguishing chamber 5 surrounding fixed / movable contacts, a trip crossbar 10 working in response to an output of an overcurrent tripping device 8, and a latch rest 11 facing the trip crossbar and locking a latch 7 of a switching mechanism at a locked position, with the latch rest arranged drooped and extended between the arc-extinguishing chamber and the trip crossbar, after securing a gas flow-out channel communicating with a load terminal-side gas exhaust port inside the molded case by expelling a partitioning barrier rib between the arc-extinguishing chamber and the latch rest, a metal-made protective cover 13 for interrupting metal melts from scattering from an arc-extinguishing chamber side by covering the locking part with the trip crossbar is fixed on a rear face of the latch rest.

Description

technical field [0001] The present invention relates to a circuit breaker including a circuit breaker such as a molded case circuit breaker or an earth leakage circuit breaker. Background technique [0002] first, image 3 The structure of the molded case circuit breaker disclosed in JP-A-2001-332162 is shown as an example of the existing structure of the circuit breaker. exist image 3 In , reference numerals 1, 2, 3 and 3a respectively denote the molded case of the circuit breaker, the load-side terminals, the fixed contacts integrally formed with the power-side terminals, and the fixed contacts. Reference numerals 4 and 4a denote a movable contact member and a movable contact, respectively. Reference numeral 5 denotes a U-shaped slotted arc extinguishing chamber which surrounds the fixed contact 3 a and the movable contact 4 a and is arranged at the bottom of the molded case 1 . Reference numerals 5a and 6 denote an iron core and a switch operating rod for blow-out, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/12
CPCH02G5/061
Inventor 小笠原诚
Owner FUJI ELECTRIC FA COMPONENTS & SYST CO LTD